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传统分类法根据卡环与一、二、三类观测线的关系将卡环分成三型。即圆环形卡环、杆型卡环和锻丝卡坏。该理论不仅有探讨之处,而且在卡环的设计原则以及临床应用上还存在矛盾。笔者提出一种新的分类法,即根据卡臂的走向和放置位置与观测线的关系将卡环的卡臂分成三型,根据卡环的固位臂类型将卡环分成二型。此分类法概念清楚,有利指导临床卡环的设计和应用及指导初学者在技术室制作卡环。
The traditional taxonomy divides the snap ring into three types according to the relationship between the snap ring and one, two and three types of observation lines. Namely ring ring, rod ring and forging cards bad card. The theory not only explores the place, but also has some contradictions in the design principle and clinical application of snap ring. The author proposes a new classification method, that is, according to the direction of the arm and the relationship between the position and the observation line, the arm of the retaining ring is divided into three types, and the retaining ring is divided into two types according to the retaining arm type of the retaining ring. The concept of this taxonomy is clear and conducive to guide the design and application of clinical clasp and guide beginners in the technical room production clasp.